Plate holder for molds



Feb. 1 6, 1932. E. M. CHANDLER 1,845,649

' PLATE HOLDER FOR MOLDS Filed Aprilv 11. 1930 s sheets-Sheet 1 lu Illfm lli Feb 16, 1932. E. M. CHANDLER 1,845,649

PLATE HOLDER FOR MOLDS Filed April 11. 195o :sshe'ets-sheet 2 Feb. 16,1932. E. M. CHANDLER PLATE HOLDER FOR MoLDs Filed April 11. A19240 5Sheets-Sheet 3 lilatenterl llielt lll w32 UbllllfED S'IMUIEISA .tireurllllil'iltlltll" l" ltllll ltllnllllllil lltllt llllllflilflll'Application tiled April 1l.,

his invention relates to the production ol duplen ingots in which theVoutside section the in dill'ers troni the composition ol the body r hecore ol the ingot.

ln the ina-lling ol ingots ol this class the inner surlace ol the nioldin which the ingot is to be cast is lirst lined with plates ol thecorrosion-resisting coatingl instal and the pouringn or" the core nietalinto the mold is so ted so that as the core metal solidilies i .forros asuperficial bond with the liningplates and `the plates become altiied tothe casting.

ln the practice ol lorniingl castings ol the above descriptiorn certainprecautions :must be obserred ol' holding' the lining plates in the moldduringI the casting operation and lor allowingI proper :lreedorn elmovement of the plates during solidilication ol the molten metal,l-leretolfore, such plates have been retained in place in 'the mold bysuction devices and a lnethod oit casting such ingots and retaining theplates in position by suction is set lorth in lllnited States patent tolCarbis,

llo. lltlll, dated March l, 1930.

rlhe particular.' object ont the present invention resides in animproved apparatus and noethod by which lining plates may be held andcontrolled in the mold during the casting mechanically instead of byemployingI suction as heretoi'ore.

Further and other objects will be herein alter set forth in theaccompanying specification and claims and shown in the drawings, whichby way ol illustration show what is now to be considered a preferredembodiment ot the invention.

ln the drawings:

lFigure 1 is a side view oi" the mold, shown partly in section and alsoshowing anelevational view oli the novel plate clamping insane. Thisview also shows a series of suc cessive positions ot the mold; A

Fig. Q is a top view of the mold showing the plate holding meansdisposed within it and securing the plates in position; l

Fig. 3 is a detail side sectional view showing the rnold and with theclamping means retaining one of the side )lates in position against thewall of the mold Fig. l is a detail side view ol one oil the espandereor plate holding devices;

ll` li is a detail sectional view talren on line -li ol ll'ig. d; and

l1 is a 'view ot a modification ol one oltthe espandere or plate holdersin which an air cylinder device is used in lieu ol a single spring.

ln more detail in the drawings, the mold 1) which is here shown, is ofthe split type.J beingl suitably hinged at the left lower cor ner ig'.2) and beingl mounted to pivot about the supporting mold shalt 11 asshown. 'lhe mold is held closed by suitable clamping,1 bolts such as 12.

lt will be understood that the mold is adapted to be hoisted up tovariable positions by means el a suitable cable connected to a suitableeye which is located at the lower right hand corner ol the mold butwhich is not shown in Fig. 1. Such hoisting cable and its use duringpouring of the metal into the mold is fully described in the Carbispatent mentioned above.

Molten metal is poured into the mold troni the left hand side and themold is gradually lowered during the pouring operation as is describedin the Corbis patent.

lt may be here stated that initially the mold is in the upper dottedline position designated A in Fig. 1, when pouring is commenced, then aspouring proceeds, it is gradn ually lowered to the intermediate dottedline lill lill

position (i. e. position B) and finally when the more is ompiaeiy finedwith molan metal the mold will reach the full line position (i. e.position C) on Fig. 1.

The plate holding apparatus here shown comprises a plate holder frame 13in the form 4of a yoke having the forked ends thereof grooved to providefor a half bearing upon the mold shaft 11. The plate holder frame iscentralized upon the shaft by suitable collars 14 and the holder is keptin contact with the mold shaft by suitable springs 15. The plate holderframe has secured to it a plate 16 having three lianged feet 17. Tothese flanged feet 17 are secured yokes or bracket members 18 (see Figs.l and 5). Each yoke 18 supports a transverse stud or shaft 19 y pressedytightly against the rnold walls by the action of the rollers under theinfluence of the spring. Mounted in the extreme upper right hand cornerof plate 16 (see Fig. l) is a bolt or stud 28 which is adapted to fitthe inclined slot of a suspension bar 29. The upper and opposite end ofthe suspension bar is connected to one end of a balancing or controllingbar 31 which is pivoted upon the fixed members or rails 30. Preferablythe opposite end of member 3l is provided with a counterweighted portion32 which projects under member 30 and is adapted to contact therewithwhen the suspension bar 29 is vin intermediate position, i. e. the Bmold position.

The operation of the device is as follows.

The in ot mold is first closed and lowered to the or lowermost position.The liner plates P are then placed in position in the ingot mold. Withthe mold in lowermost position (C) the three expander or plate holdingdevices are disposed above the top of the mold as shown in Fig. l. Themold is then elevated towards the intermediate position B and as it israised theexpander units are compressed manually or mechanically so thatthe rollers may enter the mold between the plates and are thereafterreleased to press laterall upon the plates. The mold is then elevate bythe hoisting cable to the extreme upper position (A position). Duringthis movement of the mold from position B to position A the expanderunits ride with the ingot mold and maintain the relative positionthereto which these parts have in Fig. l with respect to mold positionB. During such movement of the mold the balancing lever 29 moves fromthe full line position to the dotted line position (Fig. l).

`With the mold in the upper position everything is ready for thebeginning of the pouring operation. As the metal is poured into the moldit is gradually lowered and finally reaches the B position. During thispreliminary lowering movement of the mold the part 31 pivotally swingsupon the rail 30 and 32 abuts the lower side of the rail just as themold reaches the B position. Further downward movement of the ingot moldfrom the B to C position causes the plate holder` with the associatedexpander devices to be gradually withdrawn from mold. When the mold hasreached the bottom or lowermost position all of the expanding or plateholding devices willA have been wholly withdrawn from the mold and 'outof cooperation with the plates therein.

In Fig. 6 a slightly modified form of plate holder is provided. In lieuof utilizing a compression spring as heretofore, an air cylinder device35 provided with piston and plunger and acting to press the levers 20and 21 apart against the action of a tension spring 36. With thisarrangement the tension spring 36 would normally keep the rollers 22drawing toward one another so that the plate holder could be introducedinto the mold without manual compression of a spring. After the plateholder was int-roduced between the plates air pressure could be appliedto the air cylinder 35 to thus press the plates apart and against themold walls.

While the improved plate holder has been shown as applied to a tiltablemold it will be understood that the same mechanism could also be usedwith stationary molds in which case -the plate holding mechanism wouldbe drawn out of the mold as metal was poured into the stationary molds,0r the plate holder may remain stationary while the mold is lowered awayfrom it.

1What I claim is:

l. A plate holder for holding plates in casting duplex ingots,comprising pressing means cooperating with the inner sides of a pair ofplates. in a casting mold, and means t forwithdrawing the pressing meansfrom cooperation with the plates as the metaly is poured into the mold.

2. A plate holder for holding plates in contact with wallsof a mold incasting duplex,

ingots, comprising a plurality of plate holding pressing devicesdisposed between'and cooperating with a pair of plates to press thelatter toward walls of the mold for the purpose described.

3. A plate holder for pressing plates against walls of a tiltable moldin casting duplex ingots, said plate holder comprising a plate holdersupport which is both tiltable with the mold and which is relativelyshiftable with respect thereto as the mold is tilted, and plate holdingmeans carried by said support and adapted for cooperation with platesdisposed adjacent the walls of the mold.

4. A plate holder for pressing plates against walls of a tiltable moldincasting duplex ingots, said plate holder comprising pressing devicesadapted for disposition between the plates and for pressing the latterapart toward the'mold walls, and means for progressively withdrawing theplate holder plate pressing devices from pressing cooperation with theplates as the mold is tilted and progressively filled with molten metal.

5. A plate holder device for holding plates in contact with the walls ofa tiltable mold in casting duplex ingots, comprising plate pressingdevices for forcing the plates apart by pressure 'which is appliedbetween the plates, means supporting the pressing devices to provide tortheir maintaining an unchanged relation vvith the plates While the moldis in t certain tiltahle position, and meansit'or causing the pressingdevices to traverse across the suritace of the plates during othertilting displacements of mold.

t3. A plate holder device for holding plates 'l0 against mold vvalls incasting duplex ingots, said devices comprising a pair of members eachcarrying a roller for contact with a plate, and means for pressing saidmembers apart to thrust the rollers into contact with the plates l5 tohold the latter into contact with the mold vvalls.

ln a casting apparatus having a mold supported tor tiltable movementupon a mold sliatt and plate holding means Ytor pressing 20 platesagainst the mold Walls for casting duples ingots and comprising incombination a plate holder trame also supported upon said mold shaft,plate pressing devices carried by said 'trame with provisions forpressing plates 25 apart into contact With the mold Walls, said pressingdevices by a relative tilting of their :trame with respect to the moldbeing adapted for disposition inside of a mold and between platesdisposed adjacent the mold Walls, 30 means it'or causing the plateholder frame and the pressing devices to travel with the mold as thelatter is tilted from one position to another position, and means forautomatically bringing about a relative shifting movement B5 ot the'trame and mold when the mold is tilted 'trom a certain position toanother position so that the pressing devices travel over the plates andare eventually removed from cooperation therewith. 4U ln testimonywhereof l hereto aliix my signature.

EDWARD M. CHANDLER.

